/* banner ---------------------------------------------- */
.banner {
  position: relative;
  width: 100%;
  height: 600px;
  overflow: hidden;
}

.banner img {
  width: 100%;
  height: 600px;
}

.arrow {
  position: absolute;
  top: 50%;
  right: 60px;
  width: 71px;
  height: 71px;
  transform: translateY(-50%);
  border-radius: 6px;
  cursor: pointer;
}

.arrow:hover {
  background-color: rgba(0 0 0 / .3);
}

.prev {
  left: 60px;
  background: url('../assets/left.png') no-repeat rgba(0,0,0,.1);
}
.next {
  background: url('../assets/right.png') no-repeat rgba(0,0,0,.1);
}

/* 钢材 ----------------------------------------------- */
.steel {
  margin-top: 57px;
}

.steel-title{
  font-size: 36px;
  font-weight: bold;
  color: var(--theme);
}

.steel-txt {
  margin-top: 30px;
  margin-bottom: 40px;
  font-size: 16px;
  color: rgb(128, 128, 128);
  -webkit-text-size-adjust: 100%;
  white-space: pre-wrap;
}

.steel-box .left {
  width: 270px;
  padding: 0 15px;
  color: #fff;
  background-color: var(--theme);
  border-radius: 10px;
}

.steel-box .left-title {
  height: 94px;
  margin-bottom: 10px;
  font-size: 35px;
  line-height: 94px;
  text-align: center;
}

.steel-box .left li {
  margin-bottom: 5px;
  text-align: center;
  font-size: 18px;
  height: 40px;
  line-height: 40px;
  background-color: #4092f9;
  cursor: pointer;
}

.steel-box .left li:hover {
  background-color: #000;
}

.steel-box .left .phone {
  margin-top: 25px;
  padding-left: 85px;
  text-align: left;
  line-height: 1.42857143;
  background: url('../assets/phone.svg') no-repeat 15px center; 
}

.steel-box .left .phone p {
  font-size: 20px;
  font-weight: bold;
}

.steel-box .address {
  text-align: left;
  padding: 0 0 20px 20px;
  margin-top: 30px;
  line-height: 32px;
}

.steel-box .right {
  width: 870px;
  padding: 0 15px;
}

.steel-box .right-title {
  height: 70px;
  padding: 0 32px 0 32px;
  line-height: 70px;
  font-size: 35px;
  color: #fff;
  background-color: var(--theme);
}

.steel-box .right-list {
  display: none;
  padding-top: 30px;
  background-color: #f7f7f7;
}

.steel-box .right-list.show {
  display: flex;
}

.steel-box .right-list .img {
  position: relative;
  width: 260px;
  height: 194px;
  margin-bottom: 40px;
}

.steel-box .right-list .img img {
  width: 100%;
  height: 100%;
}

.steel-box .right-list .img::after {
  content: attr(data-title);
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 47px;
  text-align: center;
  line-height: 47px;
  color: #fff;
  background-color: var(--theme);
}

.steel-box .right-list .img:hover::after{
  background-color: #000;
}

/* .steel-show {
  margin-top: 40px;
  padding: 0 10px;
}

.steel-show > div {
  position: relative;
  width: 560px;
  height: 400px;
}

.steel-show img {
  width: 100%;
  height: 100%;
}

.steel-show > div::after {
  content: attr(data-title);
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0px;
  text-align: center;
  line-height: 60px;
  color: #fff;
  white-space: pre-wrap;
  background-color: rgb(85, 85, 85);
  transition: height .8s;
}

.steel-box > div:hover::after {
  height: 60px;
} */

/* 品质 --------------------------------------- */
.quality {
  position: relative;
  height: 700px;
  margin-top: 80px;
  background: url(https://14431431.s61i.faiusr.com/2/AD0Ix_nwBhACGAAgmdP7ywUo7qWtIDCADzi8BQ.jpg.webp) no-repeat top ,transparent;
}

.quality .center {
  width: 318px;
  height: 318px;
  font-size: 85px; 
  font-weight: bold;
  writing-mode: vertical-lr;
  line-height: 147px;
  letter-spacing: 43px;
  text-align: center;
  padding-top: 38px;
  color: rgb(255, 255, 255);
  border: 12px solid #fff;
  box-sizing: border-box;
}

.quality-des {
  position: absolute;
  left: 60.5%;
  width: 382px;
  font-size: 14px; line-height: 26px; color: rgb(255, 255, 255);
}


/* 回到顶部 =============================================== */
.toTop {
  position: fixed;
  bottom: 80px;
  right: 60px;
  width: 50px;
  height: 0px;
  background: url('../assets/toTop.png') no-repeat 0 0/cover;
  transition: height .6s;
}

.toTop.show {
  height: 50px;
}